Shangyuan means the first full moon night in the new year.
According to the Taoist saying of "Sanyuan", the 15th day of the first month is called Shangyuan Festival, the 15th day of July is called Zhongyuan Festival, and the 15th day of October is called Xiayuan Festival, which are collectively called Sanyuan.
The gods worshipped by Wudou Midao, one of the important schools of Taoism in the late Han Dynasty, were celestial officials, local officials and water officials. Heavenly god blesses the people, the local officials forgive sins, and the water officials relieve Eritrea. At the same time, with three officials and three yuan, it is said that Shangyuan Tianguan was born on the fifteenth day of the first month, Zhongyuan Diguan was born on July 15th, and Xiayuan Shuiguan was born on October 15th. Therefore, the fifteenth day of the first month is called "Shangyuan Festival". In ancient times, Shangyuan Festival was a very lively festival. Not only the people, but also the palace held a banquet to celebrate.
Expansion: Han dynasty: offering sacrifices to Taiyi God and burning lamps to show Buddha; Wei and Jin dynasties: offering sacrifices to the portal, the silkworm god and the purple ancient times; Sui and Tang dynasties: flower viewing lanterns; Song Dynasty: Lantern Festival, solve riddles on the lanterns; Ming and Qing Dynasties: Dragon and lion dances, making social fires, walking on stilts and dancing yangko.